// Copyright 2023 Ant Group Co., Ltd.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//   http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

package common

import (
	"encoding/hex"
	"math/rand"
)

var letters = []byte("23456789abcdefghijklmnpqrstuvwxyzABCDEFGHIJKLMNPQRSTUVWXYZ")

func GenerateRandomBytes(l int) []byte {
	b := make([]byte, l)
	for i := range b {
		b[i] = letters[rand.Intn(len(letters))]
	}
	return b
}

// GenerateID generates a random unique id.
func GenerateID(len int) string {
	b := make([]byte, len)
	rand.Read(b)
	return hex.EncodeToString(b)
}
